87334 Federal Register / Vol. 88, No. 241 / Monday, December 18, 2023 / Rules and Regulations 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

to do the actions required by this AD, unless 

this AD specifies otherwise. 

(i) Bombardier Temporary Revision 2A–75, 

dated May 28, 2020. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact MHI RJ Aviation Group, 

Customer Response Center, 3655 Ave. des 

Grandes-Tourelles, Suite 110, Boisbriand, 

Que ́bec J7H 0E2 Canada; North America tollfree telephone 833–990–7272 or direct-dial 

telephone 450–990–7272; fax 514–855–8501; 

email thd.crj@mhirj.com; website mhirj.com. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 216th 

St., Des Moines, WA. For information on the 

availability of this material at the FAA, call 

206–231–3195. 

(5) You may view this material at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

visit: www.archives.gov/federal-register/cfr/ 

ibr-locations or email fr.inspection@nara.gov. 

Issued on November 29, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–27680 Filed 12–15–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1505; Project 

Identifier MCAI–2023–00246–T; Amendment 

39–22622; AD 2023–24–05] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc., Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Bombardier, Inc., Model CL–600–2B16 

(604 Variant) airplanes. This AD was 

prompted by sleeve loops on some 

passenger oxygen mask lanyards that 

had improper crimping and unsealed 

ends. This AD requires an inspection of 

the passenger oxygen mask lanyards and 

replacement of defective oxygen mask 

lanyards. This AD also prohibits the 

installation of affected parts. The FAA 

is issuing this AD to address the unsafe 

condition on these products. 

DATES: This AD is effective January 22, 

2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of January 22, 2024. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1505; or in person at 

Docket Operations between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. The AD docket 

contains this final rule, the mandatory 

continuing airworthiness information 

(MCAI), any comments received, and 

other information. The address for 

Docket Operations is U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

Material Incorporated by Reference: 

• For service information identified 

in this final rule, contact Bombardier 

Business Aircraft Customer Response 

Center, 400 Coˆte-Vertu Road West, 

Dorval, Que ́bec H4S 1Y9, Canada; 

telephone 514–855–2999; email ac.yul@

aero.bombardier.com; website 

bombardier.com. 

• You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety 

Branch, 2200 South 216th St., Des 

Moines, WA. For information on the 

availability of this material at the FAA, 

call 206–231–3195. It is also available at 

regulations.gov under Docket No. FAA– 

2023–1505. 

FOR FURTHER INFORMATION CONTACT: 

Gabriel Kim, Aviation Safety Engineer, 

FAA, 1600 Stewart Avenue, Suite 410, 

Westbury, NY 11590; telephone 516– 

228–7300; email 9-avs-nyaco-cos@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain Bombardier, Inc., Model 

CL–600–2B16 (604 Variant) airplanes. 

The NPRM published in the Federal 

Register on July 25, 2023 (88 FR 47827). 

The NPRM was prompted by AD CF– 

2023–06, dated February 9, 2023 

(referred to after this as the MCAI), 

issued by Transport Canada, which is 

the aviation authority for Canada. The 

MCAI states the sleeve loops on certain 

passenger oxygen mask lanyards were 

found to have improper crimping and 

unsealed ends. 

In the NPRM, the FAA proposed to 

require an inspection of the passenger 

oxygen mask lanyards and replacement 

of defective oxygen mask lanyards. In 

the NPRM, the FAA also proposed to 

prohibit the installation of affected 

parts. The FAA is issuing this AD to 

address these defective oxygen mask 

lanyards, which could result in no 

oxygen flow to the mask during an 

emergency. 

You may examine the MCAI in the 

AD docket at regulations.gov under 

Docket No. FAA–2023–1505. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received a comment from 

Bombardier. The following presents the 

comment received on the NPRM and the 

FAA’s response to the comment. 

Request for Removal of Certain 

Variants 

Bombardier requested that the 

proposed AD be revised to remove 

reference to 601–3A and 601–3R 

Variants. The commenter stated that the 

proposed AD only applies to Model CL– 

600–2B16 (604 Variant) airplanes 

(Challenger 605 designation). 

Bombardier noted that the airplane 

serial numbers given in Bombardier 

Service Bulletin 605–35–008, dated 

October 28, 2022, and referenced in 

Transport Canada AD CF–2023–06, are 

all Model CL–600–2B16 (604 Variant) 

airplanes. 

The FAA agrees for the reasons 

provided. The FAA revised the 

Summary, Background, and paragraph 

(c) of this AD accordingly. 

Conclusion 

This product has been approved by 

the aviation authority of another 

country and is approved for operation in 

the United States. Pursuant to the FAA’s 

bilateral agreement with this State of 

Design Authority, it has notified the 

FAA of the unsafe condition described 

in the MCAI referenced above. The FAA 

reviewed the relevant data, considered 

the comments received, and determined 

that air safety requires adopting this AD 

as proposed. Accordingly, the FAA is 

issuing this AD to address the unsafe 

condition on this product. Except for 

minor editorial changes, and any other 

changes described previously, this AD is 

adopted as proposed in the NPRM. 

None of the changes will increase the 

economic burden on any operator. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Bombardier 

Service Bulletin 605–35–008, dated 

October 28, 2022. This service 

information specifies procedures for a 

visual inspection of the existing 

passenger oxygen mask lanyards 

installed in the cabin or lavatory oxygen 

box assemblies, and replacement of the 

defective oxygen mask lanyards. The 


khammond on DSKJM1Z7X2PROD with RULES
Federal Register / Vol. 88, No. 241 / Monday, December 18, 2023 / Rules and Regulations 87335 

defective oxygen mask lanyards had 

improperly crimped sleeve loops and 

unsealed ends. 

This service information is reasonably 

available because the interested parties 

have access to it through their normal 

course of business or by the means 

identified in the ADDRESSES section. 

Costs of Compliance 

The FAA estimates that this AD 

affects 120 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Inspection ............................... 1 work-hour × $85 per hour = $85 ......................................... $0 $85 $10,200 

The FAA estimates the following 

costs to do any necessary on-condition 

action that would be required based on 

the results of any required actions. The 

FAA has no way of determining the 

number of aircraft that might need this 

on-condition action: 

ESTIMATED COSTS OF ON-CONDITION ACTIONS

Action Labor cost Parts cost Cost per 

product 

Replacement .................................... 2 work-hours × $85 per hour = $170 ........................................................ $1,149 $1,319 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some or all 

costs of this AD may be covered under 

warranty, thereby reducing the cost 

impact on affected operators. 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

The FAA is issuing this rulemaking 

under the authority described in 

Subtitle VII, Part A, Subpart III, Section 

44701: General requirements. Under 

that section, Congress charges the FAA 

with promoting safe flight of civil 

aircraft in air commerce by prescribing 

regulations for practices, methods, and 

procedures the Administrator finds 

necessary for safety in air commerce. 

This regulation is within the scope of 

that authority because it addresses an 

unsafe condition that is likely to exist or 

develop on products identified in this 

rulemaking action. 

Regulatory Findings 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will not have a 

substantial direct effect on the States, on 

the relationship between the national 

government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Will not affect intrastate aviation 

in Alaska, and 

(3) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation 

safety, Incorporation by reference, 

Safety. 

The Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA amends 14 CFR part 39 as 

follows: 

PART 39—AIRWORTHINESS 

DIRECTIVES 

■ 1. The authority citation for part 39 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701. 

§ 39.13 [Amended] 

■ 2. The FAA amends § 39.13 by adding 

the following new airworthiness 

directive: 

2023–24–05 Bombardier, Inc.: Amendment 

39–22622; Docket No. FAA–2023–1505; 

Project Identifier MCAI–2023–00246–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective January 22, 2024. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Bombardier, Inc., 

Model CL–600–2B16 (604 Variant) airplanes, 

certificated in any category, serial numbers 

identified in Bombardier Service Bulletin 

605–35–008, dated October 28, 2022. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 35, Oxygen System. 

(e) Unsafe Condition 

This AD was prompted by sleeve loops on 

some passenger oxygen mask lanyards that 

had improper crimping and unsealed ends. 

The FAA is issuing this AD to address the 

defective oxygen mask lanyards. The unsafe 

condition, if not addressed, could result in 

no oxygen flow to the mask during an 

emergency. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Inspection of the Passenger Oxygen Mask 

Assemblies 

Within 48 months from the effective date 

of this AD, visually inspect the passenger 

oxygen mask lanyards in the cabin or 

lavatory oxygen box assemblies as applicable 

for crimped lanyards and sealed ends, in 

accordance with paragraph 2.C. of the 

Accomplishment Instructions of Bombardier 

Service Bulletin 605–35–008, dated October 

28, 2022. 

(1) If all passenger oxygen mask lanyards 

are crimped and the lanyard ends are sealed: 

No further action is required by this 

paragraph. 

(2) If any passenger oxygen mask lanyard 

is not crimped properly, or any lanyard end 

is not sealed properly: Before further flight, 

replace the passenger oxygen mask lanyard 

in accordance with Section 2.D. of the 

Accomplishment Instructions of Bombardier 


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87336 Federal Register / Vol. 88, No. 241 / Monday, December 18, 2023 / Rules and Regulations 

Service Bulletin 605–35–008, dated October 

28, 2022. 

(h) Parts Installation Prohibition 

As of the effective date of this AD, no 

person may install, on any airplane, a 

passenger oxygen mask lanyard assembly 

provided with an oxygen box lanyard kit 

containing a lot number in paragraph (h)(1) 

or (2) of this AD. 

(1) Oxygen box lanyard kit part number (P/ 

N) CDKC29–006–501, lot number 

2011007411, 2012010412, 2101018703, 

2101035167, 2102030139, 2104003817, or 

2105005522. 

(2) Oxygen box lanyard kit P/N CDKC29– 

006–503, lot number 2011029525, 

2012006900, 2103007412, or 2103029992. 

(i) Additional AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, International 

Validation Branch, FAA, has the authority to 

approve AMOCs for this AD, if requested 

using the procedures found in 14 CFR 39.19. 

In accordance with 14 CFR 39.19, send your 

request to your principal inspector or 

responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager, International Validation 

Branch, mail it to the address identified in 

paragraph (j)(2) of this AD or email to: 9- 

AVS-AIR-730-AMOC@faa.gov. If mailing 

information, also submit information by 

email. Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(2) Contacting the Manufacturer: For any 

requirement in this AD to obtain instructions 

from a manufacturer, the instructions must 

be accomplished using a method approved 

by the Manager, International Validation 

Branch, FAA; or Transport Canada or 

Bombardier, Inc.’s Transport Canada Design 

Approval Organization (DAO). If approved by 

the DAO, the approval must include the 

DAO-authorized signature. 

(j) Additional Information 

(1) Refer to Transport Canada AD CF– 

2023–06, dated February 9, 2023, for related 

information. This Transport Canada AD may 

be found in the AD docket at regulations.gov 

under Docket No. FAA–2023–1505. 

(2) For more information about this AD, 

contact Gabriel Kim, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 516– 

228–7300; email 9-avs-nyaco-cos@faa.gov. 

(k) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

paragraph under 5 U.S.C. 552(a) and 1 CFR 

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless this AD specifies otherwise. 

(i) Bombardier Service Bulletin 605–35– 

008, dated October 28, 2022. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact Bombardier Business 

Aircraft Customer Response Center, 400 CoˆteVertu Road West, Dorval, Que ́bec H4S 1Y9, 

Canada; telephone 514–855–2999; email 

ac.yul@aero.bombardier.com; website 

bombardier.com. 

(4) You may view this service information 

at the FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 216th 

St., Des Moines, WA. For information on the 

availability of this material at the FAA, call 

206–231–3195. 

(5) You may view this material at the 

National Archives and Records 

Administration (NARA). For information on 

the availability of this material at NARA, 

visit: www.archives.gov/federal-register/cfr/ 

ibr-locations or email fr.inspection@nara.gov. 

Issued on November 29, 2023. 

Victor Wicklund, 

Deputy Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2023–27679 Filed 12–15–23; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2023–1807; Project 

Identifier MCAI–2023–00394–T; Amendment 

39–22618; AD 2023–24–02] 

RIN 2120–AA64 

Airworthiness Directives; Embraer S.A. 

(Type Certificate Previously Held by 

Yabora ̃ Indu ́ stria Aerona ́utica S.A.; 

Embraer S.A.; Empresa Brasileira de 

Aerona ́utica S.A. (EMBRAER)) 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Embraer S.A. Model EMB–135BJ 

airplanes. This AD was prompted by 

reports of missing sealant on the rivets 

installed in the interface between rib 3 

and the wing skin. This AD requires 

applying sealant on the rivets installed 

in the interface between rib 3 and wing 

skin, as specified in an Ageˆncia 

Nacional de Aviac ̧a ̃o Civil (ANAC) AD, 

which is incorporated by reference. The 

FAA is issuing this AD to address the 

unsafe condition on these products. 

DATES: This AD is effective January 22, 

2024. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of January 22, 2024. 

ADDRESSES: 

AD Docket: You may examine the AD 

docket at regulations.gov under Docket 

No. FAA–2023–1807; or in person at 

Docket Operations between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. The AD docket 

contains this final rule, the mandatory 

continuing airworthiness information 

(MCAI), any comments received, and 

other information. The address for 

Docket Operations is U.S. Department of 

Transportation, Docket Operations, M– 

30, West Building Ground Floor, Room 

W12–140, 1200 New Jersey Avenue SE, 

Washington, DC 20590. 

Material Incorporated by Reference: 

• For material incorporated by 

reference in this AD, contact ANAC, 

Aeronautical Products Certification 

Branch (GGCP), Rua Dr. Orlando 

Feirabend Filho, 230—Centro 

Empresarial Aquarius—Torre B— 

Andares 14 a 18, Parque Residencial 

Aquarius, CEP 12.246–190—Sa ̃o Jose ́

dos Campos—SP, Brazil; telephone 55 

(12) 3203–6600; email pac@anac.gov.br; 

website anac.gov.br/en/. You may find 

this material on the ANAC website at 

sistemas.anac.gov.br/certificacao/DA/ 

DAE.asp. 

• You may view this material at the 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 2200 South 

216th St., Des Moines, WA. For 

information on the availability of this 

material at the FAA, call 206–231–3195. 

It is also available in the AD docket at 

regulations.gov under Docket No. FAA– 

2023–1807. 

FOR FURTHER INFORMATION CONTACT: 

Hassan Ibrahim, Aviation Safety 

Engineer, FAA, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; 

telephone 206–231–3653; email 

hassan.m.ibrahim@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain Embraer S.A. Model 

EMB–135BJ airplanes. The NPRM 

published in the Federal Register on 

August 30, 2023 (88 FR 59813). The 

NPRM was prompted by AD 2023–03– 

01, effective March 6, 2023, issued by 

ANAC, which is the aviation authority 

for Brazil (ANAC AD 2023–03–01) (also 

referred to as the MCAI). The MCAI 

states that missing sealant was 

identified on the rivets installed in the 

interface between rib 3 and the wing 

skin in some Embraer Model EMB– 

135BJ airplanes. The lack of sealant 

when a failure on the rivet installation 

exists may result in a potential ignition 

source inside the fuel tank during a 

lightning strike, which, combined with 

flammable fuel vapors, could result in a 


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